FR2717883A1 - Quick and tight connection device for tubular pipes. - Google Patents

Abstract

The present invention relates mainly to a quick and tight connection device for tubular conduits. A connection device according to the invention comprises two tubular elements to be connected (1, 2, 23) a locking device in the connected condition (3) and a connection and / or locking indicator (4) movable between a first position visible and a second hidden position. During connection, one of the tubular elements to be connected (1) and / or a locking device ensures (s) the driving of the indicator light from the first visible position to the second hidden position. The present invention applies mainly to the automotive industry and, in particular, to the connection of the cooling circuit of an engine to the water box of an air heater or to the connection of a medium pressure oil circuit of a steering assistance circuit of a motor vehicle.

Description

i

  QUICK AND SEALED CONNECTION DEVICE FOR

TUBULAR PIPES

  The present invention relates primarily to a quick and waterproof connection device for tubular conduits. In many fields, particularly in the automotive industry, it is essential to connect tubular pipes quickly, perfectly tightly, safely and reliably. These pipes may, for example, belong to a pneumatic circuit, to a hydraulic circuit driving water under low or medium pressure, at ambient or high temperatures, such as for example the engine cooling circuit or a circuit of oil, for example

  a steering assistance circuit.

  To ensure that the connection has been established properly, it has been proposed to provide the connecting device with a lock indicator having a first position, prior to connection, and a second position, in the connected and locked condition. However, the distinction between these two positions is not always obvious for the worker responsible for making the connection nor for the robot in the case of a chain

robotic mounting.

  It is therefore an object of the present invention to provide

  a tubular pipe connection device waterproof, safe and reliable.

  It is also an object of the present invention to provide such a device that can be provided with an unambiguous witness of connection and

2 5 locking.

  These objects are achieved according to the invention by a connecting device comprising two tubular elements to be connected, a locking device in the connected condition and a connection and / or locking indicator movable between a first visible position and a second position. hidden. When connecting, one of the tubular elements to be connected and / or a locking device provides (s) the drive of the

  witness of the first visible position to the second hidden position.

  Advantageously, the locking device comprises a ring comprising at least one lug penetrating into a slot formed in a first of the tubular elements to be connected and resting on a retaining element, in particular a shoulder of the second tubular element to be connected. Advantageously, the locking ring has a receiving zone of the witness in the second position and ensures the masking. The invention mainly relates to a device for sealing connection of a first tubular element with a second tubular element for a fluid circuit comprising locking means in a connected condition of the first and second tubular elements and a connection indicator and / or lock, characterized in that the indicator is apparent before the connection, and in that the device comprises a piece masking the witness after connecting the first and second

tubular elements.

  The invention also relates to a connecting device, characterized in that the first tubular element is a male endpiece comprising an outgrowth comprising a ramp on a slope directed towards the connecting end and a retaining element and, in particular, a shoulder on the opposite side, in that the second tubular element has at its connecting end an internal diameter slightly greater than the outer diameter of the male end and comprises at least one light, in that it further comprises a ring of locking surrounding the second tubular element comprising at least one elastic lug passing through, at least in the connected condition, the light of the second tubular element, in that, during connection, the lug (s) is (are) pushed back (s) ) by the ramp, then is (are) locked (s) by the retaining element, and in that the connection and / or locking indicator comprises (s) a ring visible in the a condition not connected and an element pushed back, during the connection, by the male end, so that the ring of the locking or connection indicator is housed in the ring

  30 which locks its presence.

  The invention also relates to a device, characterized in that the lugs have in axial section a Z-shaped profile whose end of the inner horizontal bar is directed away from the connecting end of the

second tubular element.

  The invention also relates to a device, characterized in that the lug (s) and the light (s) formed in the second tubular element have an elongate shape and are arranged radially around an axis of the device. connection and, in that the end of each lug and / or the edge of each light comprises (s) a ramp for rotating the locking ring ensuring the disengagement of the lugs of the retaining element of the nozzle male to ensure the disconnection of the

connecting device.

  The invention also relates to a connecting device, characterized in that the locking ring and the second tubular element have a relative configuration from which the lugs return by elasticity in the light (s) of the second tubular element

  to automatically reset the lock.

  The invention also relates to a device, characterized in that the locking ring and the second tubular element have a second stable relative configuration in which the lugs rest on the outer surface of the second tubular element, the relative configuration from which the lugs return by elasticity in the light (s) of the second tubular element being an intermediate configuration angularly between the condition in which the lug (s) penetrate (s) in the light (s) of the second tubular element and the second relative configuration

stable.

  Another subject of the invention is a connection device, characterized in that the connection or

lock is removable.

  The invention also relates to a connecting device, characterized in that the connection or locking indicator comprises return means in the apparent position after

a disconnection.

  The invention also relates to a device, characterized in that the second tubular element comprises locking means in axial translation of the locking ring preventing axial translation.

  of the locking ring with respect to the second tubular element.

  The invention also relates to a device, characterized in that the second tubular element comprises means for guiding the locking ring in translation between a relative condition in which the lugs rest on the external surface of the second tubular element and a condition locking in which the lugs are engaged in the light (s) arranged (s) in the second tubular element.

  The invention will be better understood by means of the description

  Hereinafter and the accompanying figures given as non-limiting examples and in which: - Figure 1 is an exploded perspective view of an embodiment of the connection device according to the present invention; - Figure 2 is a perspective view partially broken away of the connecting device according to the present invention in a condition not connected; - Figure 3 is a view similar to Figure 2, in a connected condition; FIG. 4 is a longitudinal view of a second embodiment of the connection device according to the present invention in an unconnected condition; - Figure 5 is a view similar to Figure 4 in a connected condition; - Figure 6 is a sectional view of the device of Figure 5; - Figure 7 comprises three sectional views of the lugs may be implemented in a connection device according to the present invention; - Figure 8 is a radial section of the device according to the present invention during disassembly; - Figure 9 is an axial view of a third embodiment of the device according to the present invention in a non-connected condition; - Figure 10 is an axial sectional view of the device of Figure 9 in a connected condition; - Figure 11 is an axial section of a third embodiment of a device according to the present invention in a condition not connected; - Figure 12 is a radial sectional view of the device of Figure 11; FIG. 13 is a longitudinal section of the device of FIG. 11 in a connected condition; - Figure 14 is a radial sectional view of the device of Figure 13 in the connected condition; - Figure 15 is a radial section of the device of Figure 13 during disassembly in a position allowing rearming; - Figure 16 is a radial section of the device after disassembly; FIG. 17 is a longitudinal view of the preferred embodiment of a female connector according to the present invention; - Figure 18 is a longitudinal sectional view of the female connector of Figure 17; - Figure 19 is a first radial section of the female connector of Figure 17; - Figure 20 is a second radial section of the female connector of Figure 17; FIG. 21 is a longitudinal view of a second variant of the preferred embodiment of a female connector according to the present invention; - Figure 22 is a longitudinal section of the female connector of Figure 21; - Figure 23 is a first radial section on a larger scale of the female connector of Figure 21; - Figure 24 is a second radial section of the female connector of Figure 21; FIG. 25 is a longitudinal view of the preferred embodiment of a locking ring according to the present invention; FIG. 26 is a first longitudinal section of the locking ring of FIG. 25; FIG. 27 is a front view of the locking ring of FIG. 25; Figure 28 is a second longitudinal sectional view of the locking ring of Figure 25; - Figure 29 is a radial section, on a larger scale of the locking ring of Figure 25; - Figure 30 is a longitudinal view of the preferred embodiment of the control according to the present invention; - Figure 31 is a radial section of the control of Figure 30; FIG. 32 is a longitudinal section of the control of FIG. 30; - Figure 33 is a longitudinal section of a device according to the present invention during assembly; FIG. 34 is a sectional view of a device according to FIG.

present invention assembled.

  In FIGS. 1 to 34, the same references have been used for

designate the same elements.

  In FIG. 1, an x-x 'axis connecting device according to the present invention can be seen having a first tubular element 1 and a second tubular element 2 to be connected, a sleeve or a ring of

  locking 3 and a connection and / or locking indicator 4.

  In an advantageous example of FIG. 1, the first tubular element 1 is a male tubular endpiece comprising a retaining element 5, for example an annular shoulder whose opposite side has a frustoconical ramp forming with the axis of the endpiece an angle for example between 20 and 30. Advantageously, the tip 1 comprises an angular mark 7, for example a recess formed in the outer wall of the nozzle at its connecting end. Behind the ramp 6, that is to say opposite to the connecting end, the nozzle 1 advantageously comprises a frustoconical bearing surface 8 ensuring the transition to a zone 9 of diameter greater than that of the end of connection

of the tip 1.

  The second tubular element 2 has, at the end of connection, an inner diameter slightly greater than the outer diameter of the tubular element 1, so as to form a female connector, the tubular element 1 forming a male endpiece. The second tubular element 2 comprises at least one, preferably two lumens 10, advantageously arranged symmetrically with respect to a plane passing through the x-x 'axis of the device.

3 5 connection.

  Advantageously, the light (s) has an elongate shape extending substantially parallel to a diameter of the second tubular element. As will be explained below, one end of each light 10 of an embodiment of the connecting device for disconnecting the tubular elements 1 and 2 comprise a ramp 11. On the contrary, the ends of the lights 10 of another embodiment of the connection device preventing the disconnection of the tubular elements end with an abrupt edge, for example by a

  plane surface directed towards the x-x 'axis.

  The outer surface of the second tubular element 2 of this exemplary embodiment advantageously comprises, in the angular extension of each lumen 10, a first zone 12 of a first diameter followed by a second zone 13 of a diameter greater than the diameter of the first zone 12 or a flat. Advantageously, the internal face facing the second zone 13 has an elongate cavity 14

  angular registration and / or guidance parallel to the axis x-x '.

  The sleeve or the locking ring 3 has an internal diameter slightly greater than the external diameter of the tubular element 2. At each lumen 10 of the second tubular element 2, corresponds a lug 15 comprising an elastic tongue 16 carrying a projecting element 17 of shape complementary to that of the corresponding light 10, but thick

  greater than the depth of this light 10.

  Advantageously, the projecting elements 17 comprise at least one of their ends a ramp 35 facilitating the unlocking of the device according to the present invention by rotation with sliding on the

  ramps 11, the lights 10 of the second tubular element 2.

  The connection and / or locking indicator 4 comprises a ring 18 whose internal diameter is greater than the external diameter of the connecting end of the nozzle 1 and whose outside diameter is slightly less than the internal diameter of the ring. 3, and a sleeve or, as illustrated, tabs 19 extending substantially perpendicularly to the plane of the ring 18. Each tongue 19 advantageously comprises an end 20 curved towards the axis xx 'and two notches 21 and 22 of the protruding elements 17 of the lugs 15. The indicator 4 is advantageously of a contrasting color compared to that of

  the locking ring 3 and the first tubular element 1.

  In Figure 2, one can see the tubular male end 1 and a female connector 23 having a tubular member 2, the locking ring 3 and the connection and / or locking indicator 4 assembled. The locking ring 3 is mounted around the second tubular element 2, the salient element (s) 17 penetrating into the lumen (s) 10. The tabs 19 of the indicator 4 penetrate inside the second tubular element 2, the first notches 21 receiving the salient elements 17 of the lugs 15 of the locking ring 3 (not visible in Figure 2). The ring 18 and a portion of the tabs 19 protrude from the second tubular element 2 and

of the locking ring 3.

  It may be noted that the ring 3 and the indicator 4 of the female connector 23 are immobilized in translation along the x-x 'axis and, consequently, captive. In addition, the tabs 19 of the control 4 may comprise an elastic pin engaging during assembly of the connector 23 in a

  axially elongated light (not shown).

  We go from the disconnected condition of Figure 2 to the assembled condition of Figure 3 by the alignment of the axes of the first tubular element 1 with the axis of the second tubular element 2 and by translation along the common axis xx ' with penetration of the male end 1 in the female connector 23. The ramp 6 pushes the projecting elements 17 of the lugs 15 which release the tabs 19 of the control 4 which is driven in translation by the male end 1 until blocking obtained by locking the projecting elements 17 of the lugs 15 in the second notches 22 and simultaneously their snapping at the shoulder 5 of the male end 1. The translation of the control 4 causes its disappearance inside the

locking ring 3.

  It may be necessary to allow a disconnection of the tubular elements 1 and 2 of the connection device according to the invention, for example for an inspection operation, circuit modification test or replacement of a piece. The unlocking of the connecting device can be obtained, for example, by an extraction of the lugs 15 of the lights 10. The disconnection is effected by removing the projecting elements 17 of the lugs 15 blocking the shoulder 5 of the male end 1. A at this time, traction in the opposite direction on the female connector 23 and the male end 1 ensure the disconnection. Advantageously, the unlocking, in particular

  the extraction of the lugs 15 is carried out without the use of tools.

  In an advantageous variant, not shown, the control 4 is provided with an elastic element, in particular a boss, causing, when

  unlocking, the return of the witness to its visible position.

  It may be advantageous to improve the sealing of the connecting device according to the present invention by providing a seal, for example, elastomer or plastic material between the first and second tubular elements. Advantageously, the seal 24 is directly injection-molded inside the female connector 23. An example of a connection device according to the present invention comprising such an injection-molded joint is illustrated in FIGS. 4 to 6. The second element

  tubular 2 comprises an injection orifice 25 for molding 24.

  In the embodiment of Figures 4 to 6, the second tubular element 2 is an insert, for example of plastic material penetrating forcibly into a tubular conduit 26, for example a rubber hose. Advantageously, the second tubular element is provided on its

  external face of the radial ribs 37 retention said "fir".

  Advantageously, a sleeve 27 comprises the connection between the

  flexible tubular rubber pipe 26 and the second tubular element 2.

  Advantageously, the second tubular element 2 has a shoulder

  internal 28 forming limit stop penetration of the male end 1.

  Tractions T and R 'of separation (FIG. 7a) exerted in opposite directions on the tubular elements 1 and 2 cause support of the retaining element 5 of the tubular element 1 on the projecting portion 17 of the lug 15. If the retaining element 5 is not perfectly radial, that is to say perpendicular to the x-x 'axis, this results in a force having a radial component F for raising the lugs 15 which, if it exceeds the elastic return force of the tabs 16, may cause an accidental disconnection of the

device according to the invention.

  In Figure 7, we can see three advantageous embodiment of profile protruding elements 17 pins 15 to resist without accidental disconnection to significant traction on the connection device according to the present invention. In order to increase the value of the tensile forces causing the accidental disconnection, it is possible, as illustrated in FIG. 7a, to incline the side of the projecting elements 17 of the lugs 15 as well as the radial contact surface of the slots 10 oriented towards the side of the connection end of the tubular element 2. An inclination of between 10 and 30 makes it possible to withstand without disconnection a traction of 30 daN. For example, a Z-shaped profile is used. The outer horizontal bar of the Z forms an elastic element, in particular the tongue 16. The internal horizontal bar of the Z forms the fastening element on the holding element 5 of the the male end 1. The slash of the Z connecting the two horizontal elements opposes a reaction to a radial displacement force of the lugs consecutive to a separation pull on the device of

  connection according to the present invention.

  FIG. 7b shows a lug 15 whose protruding element 17 has an axial abutment B directed towards the retaining element 5. The total width of the projecting element 17, including the abutment B, is substantially equal to the width of the apertures 10. On connection, the locking ring 3 moves slightly so that, as illustrated in FIG. 7b, the abutment B is covered by the internal wall of the second

tubular element 2.

  It is understood that the inclination of the sides of the projecting element 17 of the lug 15 and the stop B can be combined, as illustrated.

in Figure 7c.

  FIGS. 9 and 10 show an alternative embodiment of the connection device according to the present invention comprising a tubular element 2 externally connected to a flexible tubular conduit 26, for example made of elastomer, via a

  bead or a ring 29, for example also elastomer.

  The witness 4 of the exemplary embodiments of FIGS. 4, 5, 6, 9 and 10 is masked, in the locked condition, by the second element

  2 and not by the locking ring 3.

  In FIGS. 11 to 13, an exemplary embodiment of a connection device according to the present invention comprising a sliding locking ring 3 on the second element can be seen.

tubular 2.

  The second tubular element 2 advantageously comprises a ramp 30 leading to the aperture 10 and a stop 31 for blocking the translation of the locking ring 3. Before they are connected, the lugs are in the projecting position illustrated in FIGS. 11 and 12. The locking is obtained by translation of the tubular nozzle 1 and the ring 3 according to the arrow 32. The lugs 15 penetrate into the slot 10 and ensure the locking of the retaining elements 5 of the spigot 1. Unlocking is obtained , as in the case of the embodiments of the previous figures, by rotation of the locking ring 3 relative to the second tubular elements 2 according to the arrow 33. This rotation is facilitated by the presence of a ramp 11 on one end of the light 10 and a ramp 35 on the projecting element 17 of the lug 15. Figures 15 and 16 illustrate the unlocking of the connection device according to the present invention. In FIG. 15, it is possible to see the ring 3 in an unlocked condition, the projecting element 17 of the lug 15 resting in the zone 12. If the ring 3 is released in this position, the projecting element 17 returns in the light 10 by elasticity of the lug 15. Automatic reset of the connection lock is obtained. Continuing to turn the ring 3 according to the arrow 33, the envelope 15 enters the second zone 13 in which it rests stably. From this position, automatic lock reset is not achieved. Unlocking the variant embodiment of the device according to the invention comprising a stop B at the lugs 15 may require a slight axial displacement of the

  locking ring 3 with respect to the second tubular element 2.

  The rotational unlocking of FIGS. 14 to 16 also applies, advantageously, to the other variants of the device according to the present invention insofar as it is desired to provide them with the possibility of disconnection. In FIGS. 17 to 20, one can see one of the preferred embodiments of the second tubular element 2 according to the present invention substantially identical to the second tubular element 2 of FIGS. 4 to 6, but further comprising retention elements 39, in particular notches, hooks 41 of the control 4 of FIGS. 30 to 32, lugs 43 forming an abutment limiting the rotation of the locking ring 3 and an angular positioning rib with respect to the male end-piece 1. The rib 45

  has a shape complementary to the recess 7 made in the male end 1.

  Without this having any limiting character, the zone 12 from which one obtains an automatic reset of the locking by the ring 3 ends with an abrupt edge 47 not allowing to continue the rotation of the locking ring 3 towards the second

  zone 13 'having a larger diameter.

  In Figures 21 to 24, one can see the preferred embodiment of a second tubular element 2 of the type externally connected to a flexible tubular conduit 26 by means of a bead or a ring 29 The second tubular element of FIGS. 21 to 24 comprises, in addition to the improvements of the second tubular element of FIGS. 17 to 20, two ribs 49 for positioning the male endpiece. In addition, in the example illustrated in FIG. 23, a ramp 51 ensures the passage between the zones 12 and 13. This end allows, by supporting the lugs of the locking ring 3, to stably maintain the device according to the present invention. invention in an unlocked condition. It is understood that, without departing from the scope of the present invention, it is possible to equip the second tubular element of FIGS. 21 to 24 with an abrupt rim 47 (FIG. 19) or the second tubular element 2 of FIGS. with the ramp 51 without

  depart from the scope of the present invention.

  In FIGS. 25 to 29, one can see the preferred embodiment of a locking ring 3 whose lugs 15 have a radial extension separated by a radial slot 53 extending substantially

  half of the extension of the lugs 15 of a tongue 55.

  Advantageously, the locking ring 3 can rotate according to the arrows 56 to ensure unlocking, this rotation being limited by lugs 57 abutting in the lugs 43 of the second tubular element 2. Advantageously, the locking ring 3 has an indication 56 'of the rotation direction of

unlocking.

  In Figures 30 to 32, we can see the preferred embodiment of a control 4 according to the present invention comprising at the ends of the tabs 19 opposite those secured to the ring 18 a ring 59, for example frustoconical. In addition, the notches 21 and 22 are formed on the inner faces of the tongues 19 and not, as in the case of Figure 1 on the outer faces of these tongues. In the embodiment shown, the ring 18 further carries hooks 41 which are clipped in the retention elements 39 of the second tubular element 2. The hooks 41 are arranged on the connector 23 between the second tubular element 2 and the ring The hooks 41 make the witness 4 captive. Alternatively, the hooks 41 may be replaced by external lugs 61 mounted on the tongues 19, the second corresponding tubular element comprising not the retention elements 39 formed on its outer face, but recesses or lights

opening on its internal face.

  In Figure 33, one can see the device of Figures 17 to 20 and 25 to 32 during assembly (the tubular conduit 26, the overmoulding sleeve 27 and the seal 24 are not shown in this figure). The female connector 23 and / or the male end 1 approach each other respectively, respectively, the arrows 63 and 65 along the x-x 'axis. The recess 7 receives the rib 45, which ensures the angular guidance of the tip 1 relative to the connector 23. The projecting elements 17 of the lugs 15 of the locking ring 3 are separated by the ramp 6, and then lock The indicator 4 is driven inside the device and disappears masked by the locking ring 3, as illustrated in FIG. 34 and / or by the second tubular element 2. In FIG. 'we

  can see the device according to the present invention in the locked condition.

  In addition to the elements of FIG. 33, there is shown the flexible tubular conduit 26, for example a rubber hose, the overmolding sleeve 27 and the seal 24. In the example of this figure, the seal 24 is symbolized by two O-rings, it being understood that it is advantageous to implement a seal, for example lip obtained by injection by

the opening 25.

  The device according to the present invention comprises a 4 lock indicator and / or removable connection. Witness 4 is only delivered at the customer's request. Thus, a connection device without a locking and / or connection indicator is not outside the scope of the present invention. The various elements of the connection device according to the present invention are made of materials compatible with the stresses that they must undergo, in particular as regards the pressure, the maximum and minimum operating temperatures as well as the thermal cycles. The second tubular element 2 is, for example, made of plastic, in particular polyamide, in particular polyamide 6-6 loaded, for example glass fibers. The locking ring 3 is made of polyamide or PPS, the control 4, in particular the ring 18, is made of a plastic of flashy color, the male tubular end 1 is by

  example made of metal or plastic.

  It is understood that the present invention is not limited to the connection device 3, but also applies to the device of

  angled connection at right angles or other (not shown).

  The present invention applies to the fluid circuit, in particular to the pneumatic circuit, to the liquid circuit, in particular water or oil circuit for low, medium or high temperatures and for

  low, medium or high pressures.

  The present invention applies mainly to the automotive industry and, in particular, the connection of the cooling circuit of an engine to the water box of a heater or to the connection of a medium pressure oil circuit. a steering assistance circuit of a

motor vehicle.

Claims (10)

  1. Apparatus for sealing connection of a first tubular element (1) with a second tubular element (2) for a fluid circuit comprising locking means in a connected condition of the first and second tubular elements and a control (4) of connection and / or locking, characterized in that the indicator (4) is visible before the connection, and in that the device comprises a piece (3) masking the indicator (4) after connection of the first and second tubular elements (1 , 2). 2. Connection device according to claim 1, characterized in that the first tubular element (1) is a male endpiece comprising an outgrowth comprising a ramp (6) on a slope directed towards the connecting end and a retaining element ( 5) and, in particular, a shoulder on the opposite slope, in that the second tubular element (2) has at its connecting end an internal diameter slightly greater than the external diameter of the male end (1) and comprises at least one light (10), in that it further comprises a locking ring (3) surrounding the second tubular element (2) comprising at least one elastic pin (15) passing through, at least in the connected condition, the light (10) ) of the second tubular element (2), in that, during the connection, the lug (s) (15) is (are) pushed (s) by the ramp (6), then is (are) locked (s) ) by the retaining element (5), and in that the connection indicator (4) and / or locking device comprises (a) a ring (18) visible in the unconnected condition and a member pushed back, when connected, by the male end (1), so that the ring (18) of the witness (4) locking or connection is housed in the locking ring (3) which mask his presence.   3. Device according to claim 1 or 2, characterized in that the lugs (15) have in axial section a Z-shaped profile whose end of the inner horizontal bar is directed away from the connecting end the second tubular element (2).   4. Device according to claim 2 or 3, characterized in that the lug (s) and the light (s) (s) (10) formed in the second tubular element (2) have an elongated shape and are arranged radially around an axis (x-x ') of the connecting device and, in that the end of each lug (15) and / or the edge of each light (10) comprises (nt) a ramp (11, 35) for rotating the locking ring (3) for disengaging the lugs (15) from the holding element (5) from   the male end (1) for disconnecting the connecting device.   Connecting device according to claim 4, characterized in that the locking ring (3) and the second tubular element (2) have a relative configuration from which the lugs (15) spring back in the light or light. (s) (10) of the second element   tubular (2) to automatically reset the lock.   6. Device according to claim 5, characterized in that the locking ring (3) and the second tubular element (2) have a second stable relative configuration in which the lugs (15) rest on the outer surface (13) of the second tubular element (2), the relative configuration from which the lugs (15) return by elasticity in the light (s) (10) of the second tubular element (2) being an angularly intermediate configuration between the condition in which the or the lug (15) engages (s) in the light (s) (10) of the second tubular element (2)   and the second stable relative configuration.   7. Connection device according to any one of   preceding claims, characterized in that the control (4) of   connection or lock is removable.   8. Connection device according to any one of   preceding claims, characterized in that the control (4) of   connection or locking comprises means of return in the   apparent position after disconnection.   9. Device according to any one of the claims   preceding, characterized in that the second tubular element (2) comprises means (10) for locking in axial translation of the locking ring (3) preventing the axial translation of the locking ring (3) relative to to the second tubular element (2).   10. Device according to any one of claims 1 to 8,   characterized in that the second tubular element (2) comprises means for translational guidance of the locking ring (3) between a relative condition in which the lugs (15) rest on the outer surface of the second tubular element and a condition of locking in which the lugs (15) are engaged in the light (s) (10) provided in the second tubular element (2).